package com.example.demo8_1.model;

import java.sql.*;

public class DBTest {
    public String name;
    public String pass;
    public void sendinfo(String username,String password){
        this.name=username;
        this.pass=password;
    }
    public void userLogin() {
        String url = "jdbc:mysql://localhost:3306/library_management?useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true";
        String username = "root"; // 你的数据库用户名
        String password = "@yyl0716"; // 你的数据库密码
        String name = "admin";
        String pass = "admin123";
        Connection conn=null;
        PreparedStatement prep=null;
        ResultSet rs = null;
        int id = 0;
        String email = null;
        String sql= "select * from user where username = ? and password = ?";
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            conn = DriverManager.getConnection(url, username, password);
            prep = conn.prepareStatement(sql);
            prep.setString(1,name);
            prep.setString(2,pass);
            rs = prep.executeQuery();
            while(rs.next()){
                id = rs.getInt("id");
                email = rs.getString("email");
            }

        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }finally {
            try {
                rs.close();
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
            try {
                prep.close();
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
            try {
                conn.close();
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
        }
        System.out.println(id);
        System.out.println(email);
    }
}
